Origin of Blood Stem Cells (video) University of California - San Diego Share Print E-Mail Loading video... Caption Biologists at UC San Diego have located the origin of blood stem cells, or hematopoetic cells, in the zebra fish embryo. Credit UC San Diego Usage Restrictions Any re-use must include complete credits. Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.